Load Development

Steve,
Use the standard large and small Winchester primers in quite a few calibers - very good performance. Powders range from H-322, 4895, 3031, Varget all the way up to H-1000 and MRP in the magnums. Never had a missfire or heard of one with Winchesters, can't say that about Rem. or CCI.
I cannot complain about Fed. 215's in magnums but like you, I try Winchester mags. when working up a load - usually stay with them.

Happen to know that Black Hills Ammo in S. Dakota uses an awful lot of Winchester primers - they like them big time. That is good enough for me.